122101221221 has 16 divisors (see below), whose sum is σ = 140635059840. Its totient is φ = 103840376640.

The previous prime is 122101221211. The next prime is 122101221223. The reversal of 122101221221 is 122122101221.

It is not a de Polignac number, because 122101221221 - 2²⁶ = 122034112357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122101221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122101221223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7721495 + ... + 7737291.

It is an arithmetic number, because the mean of its divisors is an integer number (8789691240).

Almost surely, 2^122101221221 is an apocalyptic number.

It is an amenable number.

122101221221 is a deficient number, since it is larger than the sum of its proper divisors (18533838619).

122101221221 is a wasteful number, since it uses less digits than its factorization.

122101221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24364.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 122101221221 its reverse (122122101221), we get a palindrome (244223322442).

The spelling of 122101221221 in words is "one hundred twenty-two billion, one hundred one million, two hundred twenty-one thousand, two hundred twenty-one".